package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;

import java.io.ObjectInputFilter;
import java.time.LocalDateTime;
import java.util.List;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 新增员工
     *
     * @param employeeDTO 员工信息
     */
    @Override
    public EmployeeDTO save(EmployeeDTO employeeDTO) {
//        System.out.println("当前线程id:"+Thread.currentThread().getId());

        Employee employee = new Employee();
        // 对象拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置账号的状态,默认正常的状态 1表示正常 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码,默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置创建时间和更新时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        //设置创建人id和修改人id
        //TODO 后期需要当前登录用户id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
        employeeDTO.setId(employee.getId());
        return employeeDTO;
    }

    /**
     * 分页查询员工信息
     *
     * @param employeePageQueryDTO 分页查询条件
     * @return 分页查询结果
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        //动态拼接limit语句
        Page<Employee> employeePage = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = employeePage.getTotal();
//        System.out.println(employeePage.getPages()+" "+employeePage.getPageNum()+" "+employeePage.getPageSizeZero());
        List<Employee> records =employeePage.getResult();
//        PageResult = new PageResult(total,records);
        return new PageResult(total,records);
    }

    /**
     * 启用禁用员工
     *
     * @param status 员工状态
     * @param id     员工id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee
                .builder()
                .id(id)
                .status(status)
//                .updateTime(LocalDateTime.now())
//                .updateUser(BaseContext.getCurrentId())
                .build();

        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(Integer id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 更新员工信息
     *
     * @param employeeDTO 员工信息
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }


    @Override
    public void deleteById(Long id) {
        employeeMapper.delete(id);
    }

    /**
     * 员工登录
     *
     * @param employeeLoginDTO 员工登录信息
     * @return employee
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

//        if (employee.getStatus() == StatusConstant.DISABLE) {
        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {

            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

}
